Gerla a collection of 4 vases of different sizes and shapes obtained from a single Marble tiles of cm. 40 x 40 x 4 without producing waste material. With waterjet cutting the tile is divided into four equal pieces of cm. 20 x 20 x 4 and from each of these concentric rings are formed with a very thin thickness, about 4 mm which, superimposed and rotated among themselves, go to make the shapes of the four vases.